緇欏嚭涓涓▼搴忥紝闅忔満杈撳嚭5涓暣鏁般?/p>
鎶婇棶棰樺垎鎴愪笁涓楠わ細
1錛岃緗殢鏈烘暟鎬婚噺鍜岃鏁板櫒
2錛岃皟鐢╳hile寰幆錛屼嬌寰幆嬈℃暟涓洪殢鏈烘暟鎬婚噺
3錛屽湪while寰幆涓駭鐢熼殢鏈烘暟騫惰緭鍑?/p>
#!/bin/bash
MAX=5 #1
i=1 #2
echo "$MAX random numbers are generated:"
while [ "$i" -le $MAX ] #3
do
echo "$RANDOM" #4
let "i=i+1" #5
done
MAX=5 #1
i=1 #2
echo "$MAX random numbers are generated:"
while [ "$i" -le $MAX ] #3
do
echo "$RANDOM" #4
let "i=i+1" #5
done
#1錛氫駭鐢熼殢鏈烘暟鐨勬婚噺
#2錛氳鏁板櫒錛屽垵鍊兼槸1
#3錛氳皟鐢╳hile浣垮緱i鐨勫煎皬浜庣瓑浜嶮AX錛?le鏄皬浜庣瓑浜庣殑鎰忔濄傚搴旂殑鏁存暟姣旇緝濡備笅錛?br />
-eq 絳変簬 while [ "$a" -eq "$b" ] [ ] 鍜宼est, /usr/bin/test,/usr/bin/[涓鏍鳳紝鏄瓑浠峰懡浠ゃ?
-ne 涓嶇瓑浜? while [ "$a" -ne "$b" ]
-gt 澶т簬 while [ "$a" -gt "$b" ]
-ge 澶т簬絳変簬 while [ "$a" -ge "$b" ]
-lt 灝忎簬 while [ "$a" -lt "$b" ]
-le 灝忎簬絳変簬 while [ "$a" -le "$b" ]
< 灝忎簬(鍦ㄥ弻鎷彿涓嬌鐢? (("$a" < "$b")) (( ))鏄敤浜庤綆椾竴涓畻鏈〃杈懼紡鐨勫箋?/p>
<= 灝忎簬絳変簬(鍦ㄥ弻鎷彿涓嬌鐢? (("$a" <= "$b"))
> 澶т簬(鍦ㄥ弻鎷彿涓嬌鐢? (("$a" > "$b"))
>= 澶т簬絳変簬(鍦ㄥ弻鎷彿涓嬌鐢? (("$a" >= "$b"))
#4錛氫駭鐢熶竴涓殢鏈烘暟騫惰緭鍑猴紝闅忔満鏁拌寖鍥?锝?2767
鑴氭湰鎵ц緇撴灉錛?/p>
root@Notebook-PC:/home/lwx/myshelltest# ./test3.sh
5 random numbers are generated:
30151
29006
26024
533
22498
5 random numbers are generated:
30151
29006
26024
533
22498
]]>
鎶婇棶棰樺垎鎴愬叚涓楠わ細
1錛屽皢鏂囨湰浠ヤ竴琛屼竴涓崟璇嶇殑褰㈠紡鏄劇ず鍑烘潵
2錛屽皢澶у啓瀛楁瘝杞崲鎴愬皬鍐?/p>
3錛屽鍗曡瘝榪涜鎺掑簭
4錛屽鎺掑簭濂界殑鍗曡瘝鍒楄〃緇熻姣忎釜鍗曡瘝鍑虹幇鐨勬鏁?/p>
5錛屾寜鐓у嚭鐜扮殑嬈℃暟鎺掑簭
6錛屾樉紺哄崟璇嶅垪琛ㄧ殑鍓峮琛?/p>
鑴氭湰鐨勪唬鐮佸涓嬶細
#topn.sh鑴氭湰
#!/bin/bash
end=$1 #1
cat $2 | #2
tr -cs "[a-z][A-Z]" "[\012*]" | #3
tr A-Z a-z | #4
sort | #5
uniq -c | #6
sort -k1nr -k2 | #7
head -n"$end" #8
#!/bin/bash
end=$1 #1
cat $2 | #2
tr -cs "[a-z][A-Z]" "[\012*]" | #3
tr A-Z a-z | #4
sort | #5
uniq -c | #6
sort -k1nr -k2 | #7
head -n"$end" #8
#1錛?1涓虹涓涓弬鏁幫紝琛ㄧず杈撳嚭棰戠巼鏈楂樼殑琛屾暟
#2錛?2涓虹浜屼釜鍙傛暟錛岃〃紺虹洰鏍囨枃鏈紝浣跨敤cat鎶婄洰鏍囨枃鏈緭鍏ョ閬擄紝|涓虹閬撶
#3錛歵r鍛戒護鐨?c閫夐」鐢ㄤ簬閫夊畾涓嶅湪”[a-z][A-Z]”瀛楃闆嗗唴鐨勫瓧絎︼紝tr鍛戒護灝嗛夊畾鐨勫瓧絎﹁漿鎹㈡垚鎹㈣絎︼紝\012鏄崲琛岀鐨勫叓榪涘埗鐮侊紝*琛ㄧず灝嗘崲琛岀浠繪剰鎵╁睍錛屼嬌鍏剁瓑浜庤鏇挎崲鐨勫瓧絎﹂泦涓暟錛岃繖鏍峰氨灝嗘墍鏈夐潪瀛楁瘝鐨勭鍙瘋漿鎹負鎹㈣絎︼紝浠庤屽皢鏂囨湰鏂囦歡浠ヤ竴琛屼竴涓崟璇嶇殑褰㈠紡鏄劇ず鍑烘潵銆?s鍒犻櫎鎵鏈夐噸澶嶅嚭鐜扮殑瀛楃搴忓垪錛屽彧淇濈暀涓涓傛渶鍚庢妸寰楀埌鐨勭粨鏋滆緭鍏ョ閬撱?/p>
#4錛歵r鎶婂ぇ鍐欏瓧姣嶈漿鍖栨垚灝忓啓瀛楁瘝
#5錛氭妸鍒嗗ソ鐨勫崟璇嶈繘琛屾帓搴?/p>
#6錛歶niq瀵規帓搴忓ソ鐨勫崟璇嶅垪琛ㄧ粺璁℃瘡涓崟璇嶅嚭鐜扮殑嬈℃暟錛屽茍鍒犻櫎鐩擱偦閲嶅琛岋紝-c 鍦ㄨ緭鍑鴻鍓嶉潰鍔犱笂姣忚鍦ㄨ緭鍏ユ枃浠朵腑鍑虹幇鐨勬鏁般?榪欐牱灝卞緱鍒頒簡鍑虹幇鐨勯鐜囧強鍏跺搴旂殑鍗曡瘝銆?/p>
#7錛氱敤sort鎸夌収鍑虹幇鐨勯鐜囦粠澶уぇ灝忔帓搴忥紝棰戠巼鐩稿悓鐨勬寜鐓у瓧姣嶆帓搴忋?k1琛ㄧず鎸夌収絎竴鍩熻繘琛屾帓搴忥紝-k2涓烘寜鐓х浜屽煙榪涜鎺掑簭錛屽厛鎸夌収絎竴鍩熸帓搴忓鏋滅涓鍩熺浉絳夊啀鎸夌収絎簩鍩熸帓搴忥紝-n琛ㄧず鏁板瓧錛?r琛ㄧず浠庡ぇ鍒板皬鎺掑簭
#8錛歨ead 杈撳嚭鍓峮琛?/p>
杈撳嚭緇撴灉錛?/p>
root@lNotebook-PC:/home/lwx/myshelltest# ./topn.sh 5 test .txt
13 qwe
12 qw
11 eqw
8 sdf
7 we
13 qwe
12 qw
11 eqw
8 sdf
7 we
]]>